A plane wall with surface temperature of 350C is attached with straight rectangular fins (k = 235 W/mK). The fins are exposed to an ambient air condition of 20C and the convection heat transfer coefficient is 154 W/m2K. Each fin has a length of 50 mm, a base of 5 mm, and a width of 100 mm. Determine the efficiency, heat transfer rate, and effectiveness of each fin.